The episode examines the 1986 disappearance of 25-year-old British estate agent Suzy Lamplugh, who left her London office to show a house to a man identified in her diary as “Mr. Kipper.” Witnesses saw Suzy with a man outside the property, but she never returned to the office. Her company car was later found abandoned, and her wallet remained inside while her keys were missing. The case became one of Britain's most prominent missing-person investigations, receiving national attention through the BBC's Crimewatch. Investigators eventually focused on convicted murderer John Cannan, who was publicly named by the Metropolitan Police as the man they believed killed Suzy, although he was never charged in her disappearance and no forensic evidence has conclusively tied him to the case.

Evidence connecting Cannan to Suzy's disappearance include his use of the nickname “Kipper,” similarities between his behavior and descriptions of the man seen with Suzy, and his later conviction for the kidnapping and murder of Shirley Banks. Investigators have repeatedly searched locations connected to Cannan for Suzy's remains without finding them. However, former Scotland Yard detective David Videcette challenges the entire theory, arguing that Suzy may never have gone to the scheduled showing and that “Mr. Kipper” may not have existed. Forty years later, investigators still have unresolved witness leads, unidentified evidence from Suzy's car, and competing theories about what happened.

The case becomes a broader examination of real estate agent safety. Sandi Lyn argues that Suzy followed many of the safety procedures agents are still taught today (recording the appointment, the address, and the person she expected to meet) yet those precautions did not protect her. The episode recommends applying safety procedures consistently to every client, obtaining identification, using services such as Forewarn, meeting strangers in public first, sharing live location, maintaining current emergency information, and documenting warning signs such as stalking or unexplained gifts. The story of Birmingham agent Stephanie Slater, who was kidnapped and held for eight days by a man posing as a buyer, reinforces the risks of meeting unknown clients alone. The episode closes by highlighting the Suzy Lamplugh Trust's decades of work on stalking and lone-worker safety and contrasting Britain's formalized protections with the lack of comparable systems described for American real estate agents.

00:00 — The Disappearance of Suzy Lamplugh

02:30 — The Mysterious Mr. Kipper

06:00 — The Last Sightings

09:30 — The Search for Suzy

12:00 — John Cannan Enters the Case

15:00 — The Murder of Shirley Banks

19:33 — The “Mr. Kipper” Theory

22:30 — A Different Theory of What Happened

25:00 — Forty Years Without Answers

27:30 — What Suzy's Case Teaches Agents

30:00 — The Kidnapping of Stephanie Slater

34:00 — The Suzy Lamplugh Trust

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